Improvement jn mill



A. W. STRAUB.

Mill. Pick.

NO. 202,299 Patented April 9,1878.

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., TnMBnosnw; STRAUB, or PHILADELPHIA, PENNSYLVANIA.

' Specification forming part of Letters Patent No. 202,299, dated April9,;187 8 application filed October 30,1 877. 7 f

To all whomit may concern: .7 Be it known that I, AMBROSE W. STRAUB, ofthe city ofPhiladelphia, and in the county of Philadelphia and State ofPennsylvania, have invented certain new and useful Improvements inMill-Picks; and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it pertains to make and use it, referencebeing had to the accompanying drawings, which formpart of thisspecification, in which- Figure l is a vertical longitudinal section,Fig. 2 a side elevation, of my invention. Fig. 3 is a detail perspectiveof the wedge; Fig. 4, a perspective of the anvil-block; and Fig. 5 aperspective of the head of the pick.

The object of my invention is to provide a mill-pick of new and improvedconstruction, whereby, in the operation of picking, I obtain an 1(Evenand solid blow from the blade of the pic My invention consists in theemployment of a straight blade, which abuts against an anvilblock whichhas on one of its sides projecting ribs or teeth, by means of which saidanvilblock is held firmly in a rack formed in the head of the pick; saidanvil-block is also adjustable on said rack so as to accommodate itselfto the wear of the blade.

My invention further consists in the provision of a peculiarly-formedhead for the pick, which is made box shape, and provided with a rack onits upper surface for receiving the teeth of an anvilblock.

My invention further consists in the employment of a wedge having one ormore inclines formed on one of its sides, for instantly and securelylocking together the various parts of which the pick is composed.

My invention further consists of the peculiar arrangement, combination,and construction of parts, as hereinafter more fully described.

Referring to the accompanying drawing, A is the head of the pick, formedwith a socketbearing, a, on its under side, for the reception of the endof the handle B. O is a rack cast on the upperside of said head A, andis formed with square or rectangular teeth and recesses c and c. Saidhead is also provided with upright sidesfin which are united by ,oneor-morecross-bars, d d, which serve as bearings against which theinclines i and t" of the wedge I impinge, and securely lockingthevarious parts of the pick together.

E is an anvil-block, having on one of its sides square or rectangularteeth or ribs (2 e,"

the blade G to impinge against to receive the.

full force of the blow without springing said blade.

The anvil E is adjustable on the rack'O, so as to take up the wear ofthe blade G. The latter is made straight, as shown, and is provided witha picking or cutting edge, g.

I is a wedge, having on one of its sides one or more inclines, i and 11so that when it is placed within the head A, with its straight side &resting on the blade and anvil-block, said inclines i and i willrespectively meet the cross-bars d and d at the same time, and instantlylock said parts together. Said wedge, if desired, may be longitudinallyrecessed, as shown at 6 thereby decreasing the weight of the same andlessening the weight of the pick.

The operation is obvious: The anvil-block being placed in position inthe rack C, so as to allow sufficient length of the blade to projectbeyond the nose at of the head of the pick, the wedge I is placed inposition, as shown, the inclines i and 6 thereof instantly find theirbearings beneath and against the cross-bars d and d and look all of saidparts firmly and securely in the head A, every stroke of the picktending to stillfurther fasten and hold said parts more firmly inposition. By reversing the position of the pick, and striking the sameon its rear end (H, the wedge I is at once unlocked, and falls out of.the head A by gravity. I thus obtain a millpick which is exceedinglystrong but light in weight, all the parts thereof tending to support andgive additional strength to each other, by reason of their position inrelation to the manner in which they are locked together. I

What I claim as my invention is 1. A head for a mill-pick, formed with asocket-bearing for the reception of a handle, two upright sides unitedby cross-bars, and a rack or serrated surface, substantially as shownand described. a

2. The head A provided with a socketbearing, a, upright sides D D unitedby crossbars 01 and d, and a rack,O, having square or rectangular teethand recesses 0 and 0, substantially as shown and described.

3. The wedge I, having the longitudinal recess i inclines i and i,substantially as shown'and described, and for the purpose set forth.

4. In a mill-pick, the combination of the straight blade G andadjustable anvil-block E, having teeth upon it which mesh into a AMBROSEW. STRAUB.

Witnesses:

WELLINGTON R. KERsHNER, PETER HAY.

